Automatically-threading loom shuttle



E. S. STIMPSON. AUTOMATICALLY THREADING LOOM SHUTTLE,

I I9 1. 1,41 3,807., Patented P 25, 1922,

EDWARD s. s'rmrson, or Hermann, massacnosn'r'rs, ASSIGNOR. T0 DRAPER ooaro- RATION, 0F HOPEDALE, MASSACHUSETTS, A CORPORATION OI MAINE.

avaromarrcamrrrmnanme LOOM SHUTTLE.

Application filed December 29, 1921. Serial at. 525,764.

To all whom it may concern:

Be it known that I, EDWARD S. STIMPSON, a citizen of the United States, residing at Hopedale, in the county ofWorcester and State of Massachusetts, have invented an Improvement in AutomaticallyThreading:

Loom Shuttles, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to the automatically threading devices-of loom shuttles wherein the filling is replenished by the automatic substitution of a fresh filling carrier for the either partially threaded on the first pick or completely threaded on the second pick results in breakage of the filling. It is important, therefore,, that both these results shall be accomplished, and that thereafter unthreading of the shuttle be prevented.

The present invention consists primarily in an automatic threading device for loom shuttles of simple and cheap construction, which insures the automatic threading of the shuttle during the two flights of the shuttle following the replenishing operation, and wherein the construction is such that accidental escape of the thread from the delivery eye during weaving is eflectively prevented. A further feature of the invention consists of an automatically threading loom shuttle having a wire threading device. bent between its ends to overhang the thread passage and having a downbent thread directing leg, so that upon the first flight of the shuttle thefilling will be directed into the thread passage below the overhanging bends of the wire and on its next flight the filling will pass to the side delivery eye.

The improved construction of automatically threading shuttle and the novel characteristics of the wire threading device are Specification of Letters .Batent.

shown in the accompan in drawin in which y g Fig. 1 is a perspective view looking to-.

ward the threading being broken away; 1

Fig.1'2 is a sectional view looking into the thread assage, from a point to the rear and above t e end of the shuttle;

end of the shuttle,.par ts Manam 2154922.

" Fig. 3 is a longitudinal sectional view."

showlng more particularly the improved au tomatic threading device secured to the shuttle body; and

Fig. 4 is a plan view of the threading end portion of the shuttle.

The shuttle 1 has a usual bobbin chamber I 2 in which the bobbin or filling carrier 3 is I supported. In shuttles for automatic looms, the. filling carrier or bobbin on whichthe filling orweft thread is wound is usliallyg held'in the shuttle chamber by jaws constructed and arranged so that the incoming fresh filling carrier may eject the spent fill,-

ing carrier during the replenishing operation; 'but'since this character of construction is well known and understood, it is'not herein shown and described.

The threading end portion of the shuttle body is provided with a thread passage 4: which extends from the bobbinchamber forwardly toward the end of the shuttle eye 5 is the thread passage which'is formed in the wood of the shuttle, is extended up and communicates with the slotted side delivery eye 5. Forward of the side delivery pick of the shuttle following a replenishing I operation, the filling thread will be laid abovethe bottom portion of the thread passage owing to the fact that the end of the filling thread is secured to the fixed thread holder.

The threading device is formed of wire and between its ends it is bent into a thread- I directing portion which overhangs the thread passage'and at a point forward of the side delivery eye, 5 the wire is bent into a downwardly-extending thread directing leg which passes in close proximity to the Y between the. shoulder and the downwardly shoulder 6 of the thread passage to provide body at one side of the thread passage, and

as shown, the wood of the shuttle is cut away'as at 10 to receive the downturned end- 9 of the wire threading device so that the bend of the wire from the end 9 is below the top surface of the shuttle and offers no obstruction to the movement of the filling over the top of the shuttle into the thread passage From the end 9 where it emerges from the body of the shuttle, the wireis bent into a loop 11 which extends transversel of the thread passage toward the opposite wall thereof, and 1s downturned I in a curved arc to form a directing portion for directing the filling into the thread assage. From the bend 11 the wire extends orward toward the end of-th shuttle, and as shown has the forwardly-extending portion 12 which is carried forward of the side delivery eye, as indicated in Figs. 3 and 4, and at the forward end thereof is bent to provide a second thread directing portion- 13, which, like the thread directlng portion 11, extends transversely of and overhangs the thread passage. The loop 13 is preferably located above the shoulder 6 of the thread passage and is curled or bent outwardly at 14 toward the side of the shuttle adjacent the side delivery eye, from which point the wire is bent or turned downwardly to form a thread directing leg 15 which is located closely adjacent the wall of the thread passage forward of the side delivery .eye, as indicated" by Figs. 2 and 4. The shoulder 6 is carried toward the side wall of the thread passage and the downwardly extending thread directing leg 15 is in such proximity thereto as to provide a narrow opening 16 for the admission of the filling thread as it passes to the side delivery eye on the second pick of the shuttle.

The lower portion of the thread directing lug 15 is reversely bent at 17 to form a second passage 18 between the lower portion of the thread directing leg and the adjacent bottom wall of the thread passage. From this point 'acent the side wall of the thread passage in which the side delivery eye is formed, and the end of the wire adjacent the guard portion 20 is secured to the shuttle body so that the parts are held in the position dcscribed. In the present instance of the invention the wire is bent downwardly from the guard portion 20 to form the guide 22 about which the filling a passes on its way from the thread passage to the side delivery eye, and the end of the wire is secured to the shuttle body as at 23.

Secured to and extending from the side of the thread passage opposite the side delivery eye is the guard 2a which may be formed of wire and bent to have its leg portions 25 ex tend into the wood of the shuttle with the guard portion between the ends overhanging the thread passage and the thread directing portion of the threading device. The guard 24 maybe of more or less extent longitudinally of the shuttle but in the present instance of the invention it is made of only sufiicient length to completely overlie one of the loops of the thread directing portion of the wire threading device, and is inclined upwardly as indicated in Fig. 2 so that as the filling is drawn from the filling carrier in the shuttle, the whip of the thread as it unwinds will carry a portion of the thread over the thread directing loop 11 downward into the thread passage, and then under the guard 24 and beneath the front loop 13.

In the form of the invention shown, the wire threading device has the two thread directing loop'portions 11 and 13, and such construction or bends to the wire are preferred, because the different portions of thebent wire crossing or overhanging the thread passage afford increased support for the filling on the first flight of the shuttle, but the two looped portions 11 may not always be necessary.

The thread passage is provided with a friction device 26 which is shown in the present instance as secured to the bottom wall of the thread passage and as formed of felt or bristles, or similar frictional substance on which the filling a rests, and by which the filling is tensioned as it passes from the bobbin chamber to the side delivery eye.

The wire threading device described presents a simple and efficient means for insuring the automatic threading of the shuttle, is easily and economically manufactured and applied, and by the formation of the thread directing portions of the wire threading device, danger of unthreading due to ballooning or looping of the thread as the shuttle overcome and avoided. What is cla med 1s:-

1. An automaticallythreading loom shuttle.

having a longitudinal thread passage extending from the bobbin chamber toward the.

end of the shuttle, a slotted side delivery eye communicating with the thread chamber, and a wire threading device having its ends secured to the shuttle body at the same side of the thread passage and bent between its ends to form a thread directing loop overhanging the thread passage and a downturned directing leg frontward of the side delivery eye and reversely bent at its lower end to extend over and across the entrance to the side delivery eye.

- 2. An automaticallythreading loom shuttle having a thread passage extending longitudinally from the bobbin chamber toward the end of the shuttle, a slotted side delivery eye, and a wire threading device having one end secured to the shuttle body at. one side of the thread passage and bent to form a thread directing loop portion overhanging the thread passage, a downwardly bent directing leg frontward of the side delivery eye which is 'reversely turned at its lower portion and bent to cross the entrance'to the side delivery eye and then turned downwardly at the rear of the side delivery eye-and secured to the shuttle body. v

3. An automaticallythreading loom shuttle which is threaded by the flight of the shuttle andhaving a thread passage and a side delivery eye, a wire threading devicehaving one end secured to theshuttle body at one side of the thread, passage, loops formed in the wire of the threading device and ex tended toward the opposite wall of and to overhang the thread passage one rearward and the otherfrontward of the side delivery eye,a downturned thread directing leg frontwa'r'd of the side delivery eye bent upward at its lower portion and then rear- 1 wardly to guard the entrance to the side de-' livery eye and bent downwardly from the guarding portion and secured to the shuttle bodv. v

4. An automatically threading shuttle which is threaded by the flight of the shuttle and having a slotted side delivery eye, a thread passage extending from the'bobbin chamber forward of the side delivery eye and communicating with the bobbin chamher and side deliveryeye, a wire threading device bent to form a thread directing portion overhanging the thread'pas sage and extending forward of the side delivery eye where it is-bent downward to form a thread directing leg and having the end of the wire extending from said leg secured to the shuttle body at the same side of the thread passage as the other end of the wire thread-- ing device.

5. An automatically threading loom shuttle having a longitudinal thread passage extending from the bobbin chamber toward a wire threadingde'vice having its ends secured to the shuttle body at the same side of the thread passage and bent between its ends to form a thread directing loop overhanging the thread passage and a downturned directing leg frontward of the side delivery eye andrreversely bent at its lower end to extend over and across the entrance to the side delivery eye, and a guard extending from the oppositewall of the thread passage and overhanging the thread directing looped portion'of the wire threading device.

6. An automatically threading loom shuttle-having a slotted side delivery eye, a thread passage extending from the bobbin chamber and formedwith a shoulder forward of the thread delivery eye, a wire threading device bent to form a thread di recting portion overhanging the thread passage and-extending forward of the side delivery eye where it is bent downwardly to form a thread directing leg whose lower portion is in close proximity to the shoulder in the thread passage and forms a narrow' opening through which the body of the thread may pass as the shuttle is threaded.

7 An automatically threading loom shuttle having a. slotted side delivery eye, a thread passage extending from the bobbin chamber forward of and communicating with the side delivery eye, and a wire threading device secured to the body of the shuttle and bent to form a thread directing portion extending transversely of and overhanging the thread passage and further to form a thread directing leg extendingdown- 'wardly into the cavity forming the thread to the shuttle body-and bent between its ends to form a thread directing portion which extendsv over the thread passage at two points, one rearward of the side delivery eye and the other forward of the side delivery eye, and further bent at the forward end of the thread directing portion to form a thread directing leg.

9. An automatically" threading loom shuttle having a slotted side delivery eye and a thread passage extending from the bobbin chamber forward of the side delivery eye and communicating with the eye, a wire threading device having its two ends secured to the shuttle body and bent between its ends to form (1) a thread directing portion which extends over the thread passage at points forward and rearward offlthe side delivery eye (2) a thread directing leg downwardly extending into the thread passage, and (3) aside eye guard extending across the passage leading to the side eye.

10. An automatically threading loom shutform (1) a thread directing portion which extends over the thread passage at points forward and rearward of the side delivery eye, a thread directing leg downwardly extending into the thread passage, (3) a side eye guard extending across the passage leading to the side eye, and (4) a guiding post over which the thread may be drawn as it passes to the side delivery eye.

11. An automatically threading loom Shiittle having a slotted side delivery eye and a thread passage extending from the bobbin chamber forward of the side delivery eye and communicating with the eye, a wire threading device having its two ends secured to the shuttle body and bent between I its ends to form a thread directing portion which extends over the thread passage at' two points, one rearward of the side delivery eye and the other forward of the side delivery eye, and further bent at the forward end of the thread directing portion to form a thread directing leg, and a guard extending transversely of the thread pas-. sage above the thread directing portion.

12. An automaticallythreading loom shuttle having a longitudinally extending thread passage and a slotted side delivery eye communicating with the thread passage, a wire threading device secured at each end to the shuttle body and bent between its ends to provide a thread directing portion over;

hanging the thread passage and a down-',

turned thread directin leg closely adjacent the wall of the three the side delivery eye.

In testimony whereof, I have signed 'my name to this specification.

EDWARD s, s'riMPsoN.

passage forward of a 

